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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Book overdrafts $ 48,380 $ 63,594
Preferred Stock [Member]
    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 25,000,000 25,000,000
Preferred stock, shares issued 0 0
Common Stock [Member]
    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 400,000,000 400,000,000
Common stock, shares issued 382,607,543 382,027,940
Common stock, shares outstanding 382,607,543 382,027,940